Sky,
I have played with mine quite a bit trying to find the best for each season. I have a 2015 and run the GYTR FMF muffler only in the winter - stock muffler in the summer.
In the summer, the Aussie map works great if traction is plentiful but caused some overheating when speeds were low. The mud map worked best for the single track trails that I ride where we rarely get out of second gear. (speaking about the maps that GYTR provides with the tuner.)
For winter, I use the FMF map when temperatures are above 20 degrees. The bike does not like to start below that temp with that map. The map shared above is a good all-around performer and starts reliably below the 20 degree mark.
For where I ride (north Idaho - 6000ft average) I don't think there is one map that works for every condition / temp etc..
Riding style weighs in on map choice as well - in my opinion. For instance, I have never been one to ride in the highest RPM range. Even in the two-stroke days, I liked to stay in the meat of the power band. So with the 450, I think the only time I have heard it hit the rev-limiter is when I tipped over in a creek and gave her the whiskey throttle on my way down.